RE: HITCOLLECTOR+SCORE+DELIMA
On Dec 10, 2004, at 7:39 AM, Karthik N S wrote:
I am still in delima on How to use the HitCollector for returning
Hits hits
between scores 0.2f to 1.0f ,
There is not a simple example for the same, yet lot's of talk on usage
for
the same on the form.
1) I am not 100% sure about this but it might work.
Add the code starting with in IndexSearcher.java::search()
// inherit javadoc
public TopDocs search(Query query, Filter filter, final int nDocs)
throws IOException {
Scorer scorer = query.weight(this).scorer(reader);
if (scorer == null)
return new TopDocs(0, new ScoreDoc[0]);
final BitSet bits = filter != null ? filter.bits(reader) : null;
final HitQueue hq = new HitQueue(nDocs);
final int[] totalHits = new int[1];
scorer.score(new HitCollector() {
public final void collect(int doc, float score) {
if (score 0.0f // ignore zeroed buckets
score 0.2f score1.0f)
(bits==null || bits.get(doc))) {// skip docs not in bits
totalHits[0]++;
hq.insert(new ScoreDoc(doc, score));
}
}
});
2) Filter examples are in Lucene in Action book, Chapter 5. I wrote an
example as well:
String query = odyssey;
BooleanQuery bq = new BooleanQuery();
bq.add(new TermQuery(new Term(content, query)), true, false);
BooleanQuery bqf = new BooleanQuery();
bqf.add(new TermQuery(new Term(H2, query)), true, false);
Filter f = new QueryFilter(bqf);
IndexReader reader = IndexReader.open(new File(dir,
index).getCanonicalPath());
Searcher luceneSearcher = new
org.apache.lucene.search.IndexSearcher(reader);
luceneSearcher.setSimilarity(new NutchSimilarity());
//Logically the following would be executed as follows: Find all
//the docs matching bq. Select the ones which matchbqf
hits = luceneSearcher.search(bq, f);
System.out.print(query: + query);
System.out.println(Total hits: + hits.length());
3) delima is spelled as dilemma
-Vikas Gupta
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Re: HITCOLLECTOR+SCORE+DELIMA
On Dec 13, 2004, at 1:16 AM, Karthik N S wrote: So u say I have to Build a Filter to Collect all the Scores between the 2 Ranges [ 0.2f to 1.0f] My message is being misinterpreted. I said filter as a verb, not a noun. :) In other words, I was not intending to mean write a Filter - a Filter would not be able to filter on score. so the API for the same would be Hits hit = search(Query query, Filter filtertoGetScore) But while writing the Filter Score again depends on Hits Score = hits.score(x); Again, you cannot write a Filter (capital 'F') to deal with score. Please re-read what I said below... Hits are in descending score order, so you may just want to use Hits and filter based on the score provided by hits.score(i). Iterate over Hits... when you encounter scores below your desired range, stop iterating. Why is this simple procedure not good enough for what you are trying to achieve? Erik - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: HITCOLLECTOR+SCORE+DELIMA
Hi Guys Apologies.. So u say I have to Build a Filter to Collect all the Scores between the 2 Ranges [ 0.2f to 1.0f] so the API for the same would be Hits hit = search(Query query, Filter filtertoGetScore) But while writing the Filter Score again depends on Hits Score = hits.score(x); How To solve this Or Am I in Wrong Process Any Simple Src for the same will be greatly appreciated. :) Thx in advance -Original Message- From: Erik Hatcher [mailto:[EMAIL PROTECTED] Sent: Friday, December 10, 2004 6:54 PM To: Lucene Users List Subject: Re: HITCOLLECTOR+SCORE+DELIMA On Dec 10, 2004, at 7:39 AM, Karthik N S wrote: I am still in delima on How to use the HitCollector for returning Hits hits between scores 0.2f to 1.0f , There is not a simple example for the same, yet lot's of talk on usage for the same on the form. Unfortunately there isn't a clean way to stop a HitCollector - it will simply collect all hits. Also, scores are _not_ normalized when passed to a HitCollector, so you may get scores 1.0. Hits, however, does normalize and you're guaranteed that scores will be = 1.0. Hits are in descending score order, so you may just want to use Hits and filter based on the score provided by hits.score(i). Erik - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
HITCOLLECTOR+SCORE+DELIMA
Hi guys Apologies. I am still in delima on How to use the HitCollector for returning Hits hits between scores 0.2f to 1.0f , There is not a simple example for the same, yet lot's of talk on usage for the same on the form. Please somebody spare a bit of code (u'r intelligence) on this form. Thx in advance Karthik WITH WARM REGARDS HAVE A NICE DAY [ N.S.KARTHIK] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: HITCOLLECTOR+SCORE+DELIMA
On Dec 10, 2004, at 7:39 AM, Karthik N S wrote: I am still in delima on How to use the HitCollector for returning Hits hits between scores 0.2f to 1.0f , There is not a simple example for the same, yet lot's of talk on usage for the same on the form. Unfortunately there isn't a clean way to stop a HitCollector - it will simply collect all hits. Also, scores are _not_ normalized when passed to a HitCollector, so you may get scores 1.0. Hits, however, does normalize and you're guaranteed that scores will be = 1.0. Hits are in descending score order, so you may just want to use Hits and filter based on the score provided by hits.score(i). Erik - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
